How do I write a computation expression builder that accumulates a value and also allows standard language constructs?

Question

I have a computation expression builder that builds up a value as you go, and has many custom operations. However, it does not allow for standard F# language constructs, and I\'

Answer 1

The tutorial at "F# for fun and profit" is first class in this regard.

http://fsharpforfunandprofit.com/posts/computation-expressions-intro/